Note 4 - Loans - Activity in the Allowance for Loan Losses, by Loan Category (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Dec. 31, 2017
Balance	$ 9,562	$ 8,306	$ 9,034	$ 8,419
Charge-offs	(1,310)	(465)	(1,710)	(762)
Recoveries	327	207	535	869
Provision (credit) for loan and lease losses	880	421	1,600	(57)
Balance	9,459	8,469	9,459	8,469
Individually evaluated for impairment					$ 696	$ 773
Collectively evaluated for impairment					8,763	8,261
Total	9,562	8,306	9,459	8,469	9,459	9,034
Individually evaluated for impairment					11,529	11,341
Collectively evaluated for impairment					839,800	756,728
Total					851,329	768,069
Residential Portfolio Segment [Member]
Total					168,827	158,020
Residential Portfolio Segment [Member] \| Real Estate Loan [Member]
Balance	1,249	1,144	1,236	1,171
Charge-offs		(31)	(63)	(80)
Recoveries	121	11	127	12
Provision (credit) for loan and lease losses	(169)	24	(99)	45
Balance	1,201	1,148	1,201	1,148
Individually evaluated for impairment					8	33
Collectively evaluated for impairment					1,193	1,203
Total	1,249	1,144	1,201	1,148	1,201	1,236
Individually evaluated for impairment					1,801	1,902
Collectively evaluated for impairment					167,026	156,118
Total					168,827	158,020
Commercial Real Estate Portfolio Segment [Member]
Total					260,119	261,783
Commercial Real Estate Portfolio Segment [Member] \| Real Estate Loan [Member]
Balance	3,342	3,501	3,499	3,297
Charge-offs	(1,126)	(29)	(1,126)	(29)
Recoveries	2	1	3	5
Provision (credit) for loan and lease losses	889	(451)	731	(251)
Balance	3,107	3,022	3,107	3,022
Individually evaluated for impairment					86	138
Collectively evaluated for impairment					3,021	3,361
Total	3,342	3,501	3,107	3,022	3,107	3,499
Individually evaluated for impairment					8,464	8,164
Collectively evaluated for impairment					251,655	253,619
Total					260,119	261,783
Construction, Land Acquisition and Development [Member]
Total					23,340	20,981
Construction, Land Acquisition and Development [Member] \| Real Estate Loan [Member]
Balance	256	223	209	268
Charge-offs	0
Recoveries			30	421
Provision (credit) for loan and lease losses	(5)	13	12	(453)
Balance	251	236	251	236
Individually evaluated for impairment
Collectively evaluated for impairment					251	209
Total	256	223	251	236	251	209
Individually evaluated for impairment					83	85
Collectively evaluated for impairment					23,257	20,896
Total					23,340	20,981
Commercial and Industrial [Member]
Balance	2,505	1,679	2,340	1,736
Charge-offs	(4)	(317)	(81)	(347)
Recoveries	75	110	147	179
Provision (credit) for loan and lease losses	(121)	841	49	745
Balance	2,455	2,313	2,455	2,313
Individually evaluated for impairment					600	600
Collectively evaluated for impairment					1,855	1,740
Total	2,505	1,679	2,455	2,313	2,455	2,340
Individually evaluated for impairment					793	795
Collectively evaluated for impairment					166,208	149,308
Total					167,001	150,103
Consumer Portfolio Segment [Member]
Balance	1,822	1,410	1,395	1,457
Charge-offs	(180)	(88)	(440)	(306)
Recoveries	129	85	228	252
Provision (credit) for loan and lease losses	235	35	823	39
Balance	2,006	1,442	2,006	1,442
Individually evaluated for impairment					2	2
Collectively evaluated for impairment					2,004	1,393
Total	1,822	1,410	2,006	1,442	2,006	1,395
Individually evaluated for impairment					388	395
Collectively evaluated for impairment					178,700	134,258
Total					179,088	134,653
State and Political Subdivisions [Member]
Balance	388	349	355	490
Charge-offs	0
Recoveries	0
Provision (credit) for loan and lease losses	51	(41)	84	(182)
Balance	439	308	439	308
Individually evaluated for impairment					0
Collectively evaluated for impairment					439	355
Total	$ 388	$ 349	$ 439	$ 308	439	355
Individually evaluated for impairment
Collectively evaluated for impairment					52,954	42,529
Total					$ 52,954	$ 42,529

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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A valuation allowance for financing receivables that are expected to be uncollectible.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

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-SubTopic 10
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Amount of expense related to estimated loss from loan and lease transactions.

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